good for you

1.真替你高兴，不错啊，恭喜你啊；

2.隐含意思：我不关心，关我屁事；

例：

1. A: I got the job! 我得到那份工作啦。

B: Wow, Good for you!哇哦！真替你高兴啊！

2. A: I'm loaded. 我很有钱。

B: Good for you. 不错嘛（关我屁事）。

good for you是个褒贬皆可的习语，具体视情境而定；It can either mean "Congratulations!" and "That's great!", or as a word of praise. It is also a nice way of saying 'I don't care'.